4. Patient scheduled for pre-operative chemotherapy. These patients are excluded if they are going to be treated only on the basis of fine needle aspiration. The project seeks to correlate all tumors detected with standard histopathology of their untreated neoplasm. This exclusion criteria will be very unusual because most patients planning neoadjuvant chemotherapy do so on the basis of a pre-chemo core needle biopsy, which provide adequate histopathologic proof necessary for enrollment.